Legend:

* Current thinking is that the first post-3.5.x release (4.0?) will have no (or as little as possible) change to gameplay, but break savefile compatibility (Nick)

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* For the duration of the restructure, I'm not expecting savefile compatibility to be kept between '''any''' two revisions (Nick)

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* Or alternatively, maybe savefile compatibility should be deliberately maintained until as close as possible pre-new-release (with new savefile code written but not active) as a (partial) check on lack of gameplay change (Nick)